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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.19 by root, Wed Nov 20 02:03:09 2013 UTC vs.
Revision 1.70 by root, Fri Dec 4 02:57:14 2020 UTC

…		…
6	#include <string.h>	6	#include <string.h>
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
		11	#include <inttypes.h>
11		12
		13	#define ECB_NO_THREADS 1
12	#include "ecb.h"	14	#include "ecb.h"
13		15
14	// compatibility with perl <5.18	16	// compatibility with perl <5.18
15	#ifndef HvNAMELEN_get	17	#ifndef HvNAMELEN_get
16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))	18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
…		…
19	# define HvNAMELEN(hv) HvNAMELEN_get (hv)	21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
20	#endif	22	#endif
21	#ifndef HvNAMEUTF8	23	#ifndef HvNAMEUTF8
22	# define HvNAMEUTF8(hv) 0	24	# define HvNAMEUTF8(hv) 0
23	#endif	25	#endif
		26	#ifndef SvREFCNT_inc_NN
		27	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		28	#endif
		29	#ifndef SvREFCNT_dec_NN
		30	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		31	#endif
		32
		33	// known major and minor types
		34	enum cbor_type
		35	{
		36	MAJOR_SHIFT = 5,
		37	MINOR_MASK = 0x1f,
		38
		39	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		40	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		41	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		42	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		43	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		44	MAJOR_MAP = 5 << MAJOR_SHIFT,
		45	MAJOR_TAG = 6 << MAJOR_SHIFT,
		46	MAJOR_MISC = 7 << MAJOR_SHIFT,
		47
		48	// INT/STRING/ARRAY/MAP subtypes
		49	LENGTH_EXT1 = 24,
		50	LENGTH_EXT2 = 25,
		51	LENGTH_EXT4 = 26,
		52	LENGTH_EXT8 = 27,
		53
		54	// SIMPLE types (effectively MISC subtypes)
		55	SIMPLE_FALSE = 20,
		56	SIMPLE_TRUE = 21,
		57	SIMPLE_NULL = 22,
		58	SIMPLE_UNDEF = 23,
		59
		60	// MISC subtype (unused)
		61	MISC_EXT1 = 24,
		62	MISC_FLOAT16 = 25,
		63	MISC_FLOAT32 = 26,
		64	MISC_FLOAT64 = 27,
		65
		66	// BYTES/TEXT/ARRAY/MAP
		67	MINOR_INDEF = 31,
		68	};
24		69
25	// known tags	70	// known tags
26	enum cbor_tag	71	enum cbor_tag
27	{	72	{
28	// inofficial extensions (pending iana registration)	73	// extensions
		74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
29	CBOR_TAG_PERL_OBJECT = 24, // http://cbor.schmorp.de/perl-object	75	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
30	CBOR_TAG_GENERIC_OBJECT = 25, // http://cbor.schmorp.de/generic-object	76	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
31	CBOR_TAG_VALUE_SHAREABLE = 26, // http://cbor.schmorp.de/value-sharing	77	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
32	CBOR_TAG_VALUE_SHAREDREF = 27, // http://cbor.schmorp.de/value-sharing	78	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
33	CBOR_TAG_STRINGREF_NAMESPACE = 65537, // http://cbor.schmorp.de/stringref	79	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
34	CBOR_TAG_STRINGREF = 28, // http://cbor.schmorp.de/stringref
35	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection	80	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
36		81
37	// rfc7049	82	// rfc7049
38	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
39	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
40	CBOR_TAG_POS_BIGNUM = 2, // byte string	85	CBOR_TAG_POS_BIGNUM = 2, // byte string
41	CBOR_TAG_NEG_BIGNUM = 3, // byte string	86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
42	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
43	CBOR_TAG_BIGFLOAT = 5, // array	88	CBOR_TAG_BIGFLOAT = 5, // array
44		89
45	CBOR_TAG_CONV_B64U = 21, // base64url, any	90	CBOR_TAG_CONV_B64U = 21, // base64url, any
46	CBOR_TAG_CONV_B64 = 22, // base64, any	91	CBOR_TAG_CONV_B64 = 22, // base64, any
47	CBOR_TAG_CONV_HEX = 23, // base16, any	92	CBOR_TAG_CONV_HEX = 23, // base16, any
48	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
49		94
50	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
51	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
52	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
53	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
54	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
55		100
56	CBOR_TAG_MAGIC = 55799 // self-describe cbor	101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
57	};	102	};
58		103
		104	// known forced types, also hardcoded in CBOR.pm
		105	enum
		106	{
		107	AS_CBOR = 0,
		108	AS_INT = 1,
		109	AS_BYTES = 2,
		110	AS_TEXT = 3,
		111	AS_FLOAT16 = 4,
		112	AS_FLOAT32 = 5,
		113	AS_FLOAT64 = 6,
		114	AS_MAP = 7,
		115	// possibly future enhancements: (generic) float, (generic) string
		116	};
		117
59	#define F_SHRINK 0x00000001UL	118	#define F_SHRINK 0x00000001UL
60	#define F_ALLOW_UNKNOWN 0x00000002UL	119	#define F_ALLOW_UNKNOWN 0x00000002UL
61	#define F_ALLOW_SHARING 0x00000004UL //TODO	120	#define F_ALLOW_SHARING 0x00000004UL
		121	#define F_ALLOW_CYCLES 0x00000008UL
		122	#define F_FORBID_OBJECTS 0x00000010UL
62	#define F_DEDUP_STRINGS 0x00000008UL //TODO	123	#define F_PACK_STRINGS 0x00000020UL
63	#define F_DEDUP_KEYS 0x00000010UL //TODO	124	#define F_TEXT_KEYS 0x00000040UL
		125	#define F_TEXT_STRINGS 0x00000080UL
		126	#define F_VALIDATE_UTF8 0x00000100UL
64		127
65	#define INIT_SIZE 32 // initial scalar size to be allocated	128	#define INIT_SIZE 32 // initial scalar size to be allocated
66		129
67	#define SB do {	130	#define SB do {
68	#define SE } while (0)	131	#define SE } while (0)
…		…
80	# define CBOR_SLOW 0	143	# define CBOR_SLOW 0
81	# define CBOR_STASH cbor_stash	144	# define CBOR_STASH cbor_stash
82	#endif	145	#endif
83		146
84	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	147	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
85	static SV *types_true, *types_false, *types_error, *sv_cbor;	148	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
86		149
87	typedef struct {	150	typedef struct {
88	U32 flags;	151	U32 flags;
89	U32 max_depth;	152	U32 max_depth;
90	STRLEN max_size;	153	STRLEN max_size;
		154	SV *filter;
		155
		156	// for the incremental parser
		157	STRLEN incr_pos; // the current offset into the text
		158	STRLEN incr_need; // minimum bytes needed to decode
		159	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
91	} CBOR;	160	} CBOR;
92		161
93	ecb_inline void	162	ecb_inline void
94	cbor_init (CBOR *cbor)	163	cbor_init (CBOR *cbor)
95	{	164	{
96	Zero (cbor, 1, CBOR);	165	Zero (cbor, 1, CBOR);
97	cbor->max_depth = 512;	166	cbor->max_depth = 512;
		167	}
		168
		169	ecb_inline void
		170	cbor_free (CBOR *cbor)
		171	{
		172	SvREFCNT_dec (cbor->filter);
		173	SvREFCNT_dec (cbor->incr_count);
98	}	174	}
99		175
100	/////////////////////////////////////////////////////////////////////////////	176	/////////////////////////////////////////////////////////////////////////////
101	// utility functions	177	// utility functions
102		178
…		…
124	SvPV_renew (sv, SvCUR (sv) + 1);	200	SvPV_renew (sv, SvCUR (sv) + 1);
125	#endif	201	#endif
126	}	202	}
127	}	203	}
128		204
		205	// minimum length of a string to be registered for stringref
		206	ecb_inline int
		207	minimum_string_length (UV idx)
		208	{
		209	return idx <= 23 ? 3
		210	: idx <= 0xffU ? 4
		211	: idx <= 0xffffU ? 5
		212	: idx <= 0xffffffffU ? 7
		213	: 11;
		214	}
		215
129	/////////////////////////////////////////////////////////////////////////////	216	/////////////////////////////////////////////////////////////////////////////
130	// encoder	217	// encoder
131		218
132	// structure used for encoding CBOR	219	// structure used for encoding CBOR
133	typedef struct	220	typedef struct
…		…
135	char *cur; // SvPVX (sv) + current output position	222	char *cur; // SvPVX (sv) + current output position
136	char *end; // SvEND (sv)	223	char *end; // SvEND (sv)
137	SV *sv; // result scalar	224	SV *sv; // result scalar
138	CBOR cbor;	225	CBOR cbor;
139	U32 depth; // recursion level	226	U32 depth; // recursion level
140	HV *stringref; // string => index, or 0	227	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		228	UV stringref_idx;
141	HV *shareable; // ptr => index, or 0	229	HV *shareable; // ptr => index, or 0
142	UV shareable_idx;	230	UV shareable_idx;
143	} enc_t;	231	} enc_t;
144		232
145	ecb_inline void	233	ecb_inline void
146	need (enc_t *enc, STRLEN len)	234	need (enc_t *enc, STRLEN len)
147	{	235	{
148	if (ecb_expect_false (enc->cur + len >= enc->end))	236	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
149	{	237	{
150	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	238	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
151	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	239	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
152	enc->cur = SvPVX (enc->sv) + cur;	240	enc->cur = SvPVX (enc->sv) + cur;
153	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	241	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
154	}	242	}
155	}	243	}
156		244
		245	static void encode_sv (enc_t *enc, SV *sv);
		246
157	ecb_inline void	247	ecb_inline void
158	encode_ch (enc_t *enc, char ch)	248	encode_ch (enc_t *enc, char ch)
159	{	249	{
160	need (enc, 1);	250	need (enc, 1);
161	*enc->cur++ = ch;	251	*enc->cur++ = ch;
162	}	252	}
163		253
		254	// used for tags, intregers, element counts and so on
164	static void	255	static void
165	encode_uint (enc_t *enc, int major, UV len)	256	encode_uint (enc_t *enc, int major, UV len)
166	{	257	{
167	need (enc, 9);	258	need (enc, 9);
168		259
169	if (len < 24)	260	if (ecb_expect_true (len < LENGTH_EXT1))
170	*enc->cur++ = major | len;	261	*enc->cur++ = major | len;
171	else if (len <= 0xff)	262	else if (ecb_expect_true (len <= 0xffU))
172	{	263	{
173	*enc->cur++ = major | 24;	264	*enc->cur++ = major | LENGTH_EXT1;
174	*enc->cur++ = len;	265	*enc->cur++ = len;
175	}	266	}
176	else if (len <= 0xffff)	267	else if (len <= 0xffffU)
177	{	268	{
178	*enc->cur++ = major | 25;	269	*enc->cur++ = major | LENGTH_EXT2;
179	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
180	*enc->cur++ = len;	271	*enc->cur++ = len;
181	}	272	}
182	else if (len <= 0xffffffff)	273	else if (len <= 0xffffffffU)
183	{	274	{
184	*enc->cur++ = major | 26;	275	*enc->cur++ = major | LENGTH_EXT4;
185	*enc->cur++ = len >> 24;	276	*enc->cur++ = len >> 24;
186	*enc->cur++ = len >> 16;	277	*enc->cur++ = len >> 16;
187	*enc->cur++ = len >> 8;	278	*enc->cur++ = len >> 8;
188	*enc->cur++ = len;	279	*enc->cur++ = len;
189	}	280	}
190	else	281	else
191	{	282	{
192	*enc->cur++ = major | 27;	283	*enc->cur++ = major | LENGTH_EXT8;
193	*enc->cur++ = len >> 56;	284	*enc->cur++ = len >> 56;
194	*enc->cur++ = len >> 48;	285	*enc->cur++ = len >> 48;
195	*enc->cur++ = len >> 40;	286	*enc->cur++ = len >> 40;
196	*enc->cur++ = len >> 32;	287	*enc->cur++ = len >> 32;
197	*enc->cur++ = len >> 24;	288	*enc->cur++ = len >> 24;
…		…
199	*enc->cur++ = len >> 8;	290	*enc->cur++ = len >> 8;
200	*enc->cur++ = len;	291	*enc->cur++ = len;
201	}	292	}
202	}	293	}
203		294
204	static void	295	// encodes a perl value into a CBOR integer
		296	ecb_inline void
		297	encode_int (enc_t *enc, SV *sv)
		298	{
		299	if (SvIsUV (sv))
		300	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		301	else if (SvIVX (sv) >= 0)
		302	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		303	else
		304	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		305	}
		306
		307	ecb_inline void
		308	encode_tag (enc_t *enc, UV tag)
		309	{
		310	encode_uint (enc, MAJOR_TAG, tag);
		311	}
		312
		313	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		314	ecb_noinline static void
205	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	315	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
206	{	316	{
207	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	317	STRLEN ulen = len;
		318	U8 *p, *pend = (U8 *)str + len;
		319
		320	for (p = (U8 *)str; p < pend; ++p)
		321	ulen += *p >> 7; // count set high bits
		322
		323	encode_uint (enc, MAJOR_TEXT, ulen);
		324
		325	need (enc, ulen);
		326	for (p = (U8 *)str; p < pend; ++p)
		327	if (*p < 0x80)
		328	*enc->cur++ = *p;
		329	else
		330	{
		331	*enc->cur++ = 0xc0 + (*p >> 6);
		332	*enc->cur++ = 0x80 + (*p & 63);
		333	}
		334	}
		335
		336	ecb_inline void
		337	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		338	{
		339	if (ecb_expect_false (upgrade_utf8))
		340	if (!utf8)
		341	{
		342	encode_str_utf8 (enc, utf8, str, len);
		343	return;
		344	}
		345
		346	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
208	need (enc, len);	347	need (enc, len);
209	memcpy (enc->cur, str, len);	348	memcpy (enc->cur, str, len);
210	enc->cur += len;	349	enc->cur += len;
211	}	350	}
212		351
213	ecb_inline void	352	ecb_inline void
		353	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		354	{
		355	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		356	{
		357	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		358
		359	if (SvOK (*svp))
		360	{
		361	// already registered, use stringref
		362	encode_tag (enc, CBOR_TAG_STRINGREF);
		363	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		364	return;
		365	}
		366	else if (len >= minimum_string_length (enc->stringref_idx))
		367	{
		368	// register only
		369	sv_setuv (*svp, enc->stringref_idx);
		370	++enc->stringref_idx;
		371	}
		372	}
		373
		374	encode_str (enc, upgrade_utf8, utf8, str, len);
		375	}
		376
		377	ecb_inline void
214	encode_tag (enc_t *enc, UV tag)	378	encode_float16 (enc_t *enc, NV nv)
215	{	379	{
216	encode_uint (enc, 0xc0, tag);	380	need (enc, 1+2);
217	}
218		381
219	static void encode_sv (enc_t *enc, SV *sv);	382	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		383
		384	uint16_t fp = ecb_float_to_binary16 (nv);
		385
		386	if (!ecb_big_endian ())
		387	fp = ecb_bswap16 (fp);
		388
		389	memcpy (enc->cur, &fp, 2);
		390	enc->cur += 2;
		391	}
		392
		393	ecb_inline void
		394	encode_float32 (enc_t *enc, NV nv)
		395	{
		396	need (enc, 1+4);
		397
		398	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		399
		400	uint32_t fp = ecb_float_to_binary32 (nv);
		401
		402	if (!ecb_big_endian ())
		403	fp = ecb_bswap32 (fp);
		404
		405	memcpy (enc->cur, &fp, 4);
		406	enc->cur += 4;
		407	}
		408
		409	ecb_inline void
		410	encode_float64 (enc_t *enc, NV nv)
		411	{
		412	need (enc, 1+8);
		413
		414	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		415
		416	uint64_t fp = ecb_double_to_binary64 (nv);
		417
		418	if (!ecb_big_endian ())
		419	fp = ecb_bswap64 (fp);
		420
		421	memcpy (enc->cur, &fp, 8);
		422	enc->cur += 8;
		423	}
		424
		425	ecb_inline void
		426	encode_bool (enc_t *enc, int istrue)
		427	{
		428	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		429	}
		430
		431	// encodes an arrayref containing key-value pairs as CBOR map
		432	ecb_inline void
		433	encode_array_as_map (enc_t *enc, SV *sv)
		434	{
		435	if (enc->depth >= enc->cbor.max_depth)
		436	croak (ERR_NESTING_EXCEEDED);
		437
		438	++enc->depth;
		439
		440	// as_map does error checking for us, but we re-check in case
		441	// things have changed.
		442
		443	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		444	croak ("CBOR::XS::as_map requires an array reference (did you change the array after calling as_map?)");
		445
		446	AV *av = (AV *)SvRV (sv);
		447	int i, len = av_len (av);
		448
		449	if (!(len & 1))
		450	croak ("CBOR::XS::as_map requires an even number of elements (did you change the array after calling as_map?)");
		451
		452	encode_uint (enc, MAJOR_MAP, (len + 1) >> 1);
		453
		454	for (i = 0; i <= len; ++i)
		455	{
		456	SV **svp = av_fetch (av, i, 0);
		457	encode_sv (enc, svp ? *svp : &PL_sv_undef);
		458	}
		459
		460	--enc->depth;
		461	}
		462
		463	ecb_inline void
		464	encode_forced (enc_t *enc, UV type, SV *sv)
		465	{
		466	switch (type)
		467	{
		468	case AS_CBOR:
		469	{
		470	STRLEN len;
		471	char *str = SvPVbyte (sv, len);
		472
		473	need (enc, len);
		474	memcpy (enc->cur, str, len);
		475	enc->cur += len;
		476	}
		477	break;
		478
		479	case AS_BYTES:
		480	{
		481	STRLEN len;
		482	char *str = SvPVbyte (sv, len);
		483	encode_strref (enc, 0, 0, str, len);
		484	}
		485	break;
		486
		487	case AS_TEXT:
		488	{
		489	STRLEN len;
		490	char *str = SvPVutf8 (sv, len);
		491	encode_strref (enc, 1, 1, str, len);
		492	}
		493	break;
		494
		495	case AS_INT: encode_int (enc, sv); break;
		496
		497	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		498	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		499	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		500
		501	case AS_MAP: encode_array_as_map (enc, sv); break;
		502
		503	default:
		504	croak ("encountered malformed CBOR::XS::Tagged object");
		505	}
		506	}
220		507
221	static void	508	static void
222	encode_av (enc_t *enc, AV *av)	509	encode_av (enc_t *enc, AV *av)
223	{	510	{
224	int i, len = av_len (av);	511	int i, len = av_len (av);
…		…
226	if (enc->depth >= enc->cbor.max_depth)	513	if (enc->depth >= enc->cbor.max_depth)
227	croak (ERR_NESTING_EXCEEDED);	514	croak (ERR_NESTING_EXCEEDED);
228		515
229	++enc->depth;	516	++enc->depth;
230		517
231	encode_uint (enc, 0x80, len + 1);	518	encode_uint (enc, MAJOR_ARRAY, len + 1);
232		519
		520	if (ecb_expect_false (SvMAGICAL (av)))
233	for (i = 0; i <= len; ++i)	521	for (i = 0; i <= len; ++i)
234	{	522	{
235	SV **svp = av_fetch (av, i, 0);	523	SV **svp = av_fetch (av, i, 0);
236	encode_sv (enc, svp ? *svp : &PL_sv_undef);	524	encode_sv (enc, svp ? *svp : &PL_sv_undef);
237	}	525	}
		526	else
		527	for (i = 0; i <= len; ++i)
		528	{
		529	SV *sv = AvARRAY (av)[i];
		530	encode_sv (enc, sv ? sv : &PL_sv_undef);
		531	}
238		532
239	--enc->depth;	533	--enc->depth;
240	}	534	}
241		535
242	static void	536	static void
…		…
250	++enc->depth;	544	++enc->depth;
251		545
252	int pairs = hv_iterinit (hv);	546	int pairs = hv_iterinit (hv);
253	int mg = SvMAGICAL (hv);	547	int mg = SvMAGICAL (hv);
254		548
255	if (mg)	549	if (ecb_expect_false (mg))
256	encode_ch (enc, 0xa0 | 31);	550	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
257	else	551	else
258	encode_uint (enc, 0xa0, pairs);	552	encode_uint (enc, MAJOR_MAP, pairs);
259		553
260	while ((he = hv_iternext (hv)))	554	while ((he = hv_iternext (hv)))
261	{	555	{
262	if (HeKLEN (he) == HEf_SVKEY)	556	if (HeKLEN (he) == HEf_SVKEY)
263	encode_sv (enc, HeSVKEY (he));	557	encode_sv (enc, HeSVKEY (he));
264	else	558	else
265	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	559	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
266		560
267	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	561	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
268	}	562	}
269		563
270	if (mg)	564	if (ecb_expect_false (mg))
271	encode_ch (enc, 0xe0 | 31);	565	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
272		566
273	--enc->depth;	567	--enc->depth;
274	}	568	}
275		569
276	// encode objects, arrays and special \0=false and \1=true values.	570	// encode objects, arrays and special \0=false and \1=true values.
277	static void	571	static void
278	encode_rv (enc_t *enc, SV *sv)	572	encode_rv (enc_t *enc, SV *sv)
279	{	573	{
280	SvGETMAGIC (sv);	574	SvGETMAGIC (sv);
281
282	if (ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING)
283	&& ecb_expect_false (SvREFCNT (sv) > 1))
284	{
285	if (!enc->shareable)
286	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
287
288	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
289
290	if (SvOK (*svp))
291	{
292	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
293	encode_uint (enc, 0x00, SvUV (*svp));
294	return;
295	}
296	else
297	{
298	sv_setuv (*svp, enc->shareable_idx);
299	++enc->shareable_idx;
300	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
301	}
302	}
303		575
304	svtype svt = SvTYPE (sv);	576	svtype svt = SvTYPE (sv);
305		577
306	if (ecb_expect_false (SvOBJECT (sv)))	578	if (ecb_expect_false (SvOBJECT (sv)))
307	{	579	{
…		…
314	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
315	? cbor_tagged_stash	587	? cbor_tagged_stash
316	: gv_stashpv ("CBOR::XS::Tagged" , 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
317		589
318	HV *stash = SvSTASH (sv);	590	HV *stash = SvSTASH (sv);
319	GV *method;
320		591
321	if (stash == boolean_stash)	592	if (stash == boolean_stash)
322	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	593	{
		594	encode_bool (enc, SvIV (sv));
		595	return;
		596	}
323	else if (stash == error_stash)	597	else if (stash == error_stash)
324	encode_ch (enc, 0xe0 | 23);	598	{
		599	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		600	return;
		601	}
325	else if (stash == tagged_stash)	602	else if (stash == tagged_stash)
326	{	603	{
327	if (svt != SVt_PVAV)	604	if (svt != SVt_PVAV)
328	croak ("encountered CBOR::XS::Tagged object that isn't an array");	605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
329		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
330	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
331	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	612	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		613	break;
		614
		615	case 3-1:
		616	// a forced type [value, type, undef]
		617	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		618	break;
		619
		620	default:
		621	croak ("encountered malformed CBOR::XS::Tagged object");
		622	}
		623
		624	return;
		625	}
		626	}
		627
		628	if (ecb_expect_false (SvREFCNT (sv) > 1)
		629	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		630	{
		631	if (ecb_expect_false (!enc->shareable))
		632	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		633
		634	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		635
		636	if (SvOK (*svp))
332	}	637	{
		638	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		639	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		640	return;
		641	}
		642	else
		643	{
		644	sv_setuv (*svp, enc->shareable_idx);
		645	++enc->shareable_idx;
		646	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		647	}
		648	}
		649
		650	if (ecb_expect_false (SvOBJECT (sv)))
		651	{
		652	HV *stash = SvSTASH (sv);
		653	GV *method;
		654
		655	if (enc->cbor.flags & F_FORBID_OBJECTS)
		656	croak ("encountered object '%s', but forbid_objects is enabled",
		657	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
333	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	658	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
334	{	659	{
335	dSP;	660	dSP;
336		661
337	ENTER; SAVETMPS; PUSHMARK (SP);	662	ENTER; SAVETMPS;
		663	PUSHMARK (SP);
338	// we re-bless the reference to get overload and other niceties right	664	// we re-bless the reference to get overload and other niceties right
339	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
340		666
341	PUTBACK;	667	PUTBACK;
342	// G_SCALAR ensures that return value is 1	668	// G_SCALAR ensures that return value is 1
…		…
355	}	681	}
356	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	682	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
357	{	683	{
358	dSP;	684	dSP;
359		685
360	ENTER; SAVETMPS; PUSHMARK (SP);	686	ENTER; SAVETMPS;
		687	PUSHMARK (SP);
361	EXTEND (SP, 2);	688	EXTEND (SP, 2);
362	// we re-bless the reference to get overload and other niceties right	689	// we re-bless the reference to get overload and other niceties right
363	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	690	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
364	PUSHs (sv_cbor);	691	PUSHs (sv_cbor);
365		692
…		…
370	// catch this surprisingly common error	697	// catch this surprisingly common error
371	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	698	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
372	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	699	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
373		700
374	encode_tag (enc, CBOR_TAG_PERL_OBJECT);	701	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
375	encode_uint (enc, 0x80, count + 1);	702	encode_uint (enc, MAJOR_ARRAY, count + 1);
376	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	703	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
377		704
378	while (count)	705	{
		706	int i;
		707
		708	for (i = 0; i < count; ++i)
379	encode_sv (enc, SP[1 - count--]);	709	encode_sv (enc, SP[i + 1 - count]);
		710
		711	SP -= count;
		712	}
380		713
381	PUTBACK;	714	PUTBACK;
382		715
383	FREETMPS; LEAVE;	716	FREETMPS; LEAVE;
384	}	717	}
…		…
402	{	735	{
403	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
404		737
405	need (enc, 9);	738	need (enc, 9);
406		739
407	if (ecb_expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
408	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
409	//TODO: maybe I32?	742	//TODO: maybe I32?
410	else if (ecb_expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
411	{	744	encode_float32 (enc, nv);
412	uint32_t fp = ecb_float_to_binary32 (nv);
413
414	*enc->cur++ = 0xe0 | 26;
415
416	if (!ecb_big_endian ())
417	fp = ecb_bswap32 (fp);
418
419	memcpy (enc->cur, &fp, 4);
420	enc->cur += 4;
421	}
422	else	745	else
423	{	746	encode_float64 (enc, nv);
424	uint64_t fp = ecb_double_to_binary64 (nv);
425
426	*enc->cur++ = 0xe0 | 27;
427
428	if (!ecb_big_endian ())
429	fp = ecb_bswap64 (fp);
430
431	memcpy (enc->cur, &fp, 8);
432	enc->cur += 8;
433	}
434	}	747	}
435		748
436	static void	749	static void
437	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
438	{	751	{
…		…
440		753
441	if (SvPOKp (sv))	754	if (SvPOKp (sv))
442	{	755	{
443	STRLEN len;	756	STRLEN len;
444	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
445	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
446	}	759	}
447	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
448	encode_nv (enc, sv);	761	encode_nv (enc, sv);
449	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
450	{	763	encode_int (enc, sv);
451	if (SvIsUV (sv))
452	encode_uint (enc, 0x00, SvUVX (sv));
453	else if (SvIVX (sv) >= 0)
454	encode_uint (enc, 0x00, SvIVX (sv));
455	else
456	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
457	}
458	else if (SvROK (sv))	764	else if (SvROK (sv))
459	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
460	else if (!SvOK (sv))	766	else if (!SvOK (sv))
461	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
462	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
463	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
464	else	770	else
465	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	771	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
466	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
467	}	773	}
468		774
469	static SV *	775	static SV *
470	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
471	{	777	{
472	enc_t enc = { };	778	enc_t enc = { 0 };
473		779
474	enc.cbor = *cbor;	780	enc.cbor = *cbor;
475	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
476	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
477	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
478		784
479	SvPOK_only (enc.sv);	785	SvPOK_only (enc.sv);
		786
		787	if (cbor->flags & F_PACK_STRINGS)
		788	{
		789	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		790	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		791	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		792	}
		793
480	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
481		795
482	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
483	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	797	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
484		798
…		…
499	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
500	CBOR cbor;	814	CBOR cbor;
501	U32 depth; // recursion depth	815	U32 depth; // recursion depth
502	U32 maxdepth; // recursion depth limit	816	U32 maxdepth; // recursion depth limit
503	AV *shareable;	817	AV *shareable;
		818	AV *stringref;
		819	SV *decode_tagged;
		820	SV *err_sv; // optional sv for error, needs to be freed
504	} dec_t;	821	} dec_t;
505		822
506	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	823	// set dec->err to ERRSV
		824	ecb_cold static void
		825	err_errsv (dec_t *dec)
		826	{
		827	if (!dec->err)
		828	{
		829	dec->err_sv = newSVsv (ERRSV);
507		830
508	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	831	// chop off the trailing \n
		832	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		833	*SvEND (dec->err_sv) = 0;
509		834
		835	dec->err = SvPVutf8_nolen (dec->err_sv);
		836	}
		837	}
		838
		839	// the following functions are used to reduce code size and help the compiler to optimise
		840	ecb_cold static void
		841	err_set (dec_t *dec, const char *reason)
		842	{
		843	if (!dec->err)
		844	dec->err = reason;
		845	}
		846
		847	ecb_cold static void
		848	err_unexpected_end (dec_t *dec)
		849	{
		850	err_set (dec, "unexpected end of CBOR data");
		851	}
		852
		853	#define ERR_DO(do) SB do; goto fail; SE
		854	#define ERR(reason) ERR_DO (err_set (dec, reason))
		855	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		856
		857	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		858
510	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	859	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
511	#define DEC_DEC_DEPTH --dec->depth	860	#define DEC_DEC_DEPTH --dec->depth
512		861
513	static UV	862	static UV
514	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
515	{	864	{
516	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
517	{	866	++dec->cur;
518	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
519	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
520	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
521	return *dec->cur++ & 31;
522		867
523	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
524	WANT (2);	872	WANT (1);
525	dec->cur += 2;	873	dec->cur += 1;
526	return dec->cur[-1];	874	return dec->cur[-1];
527		875	}
528	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
529	WANT (3);	878	WANT (2);
530	dec->cur += 3;	879	dec->cur += 2;
531	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
532	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
533		882	}
534	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
535	WANT (5);	885	WANT (4);
536	dec->cur += 5;	886	dec->cur += 4;
537	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
538	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
539	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
540	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
541		891	}
542	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
543	WANT (9);	894	WANT (8);
544	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
545	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
546	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
547	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
548	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
549	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
550	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
551	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
552	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
553		910	}
554	default:	911	else
555	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
556	}
557		913
558	fail:	914	fail:
559	return 0;	915	return 0;
560	}	916	}
561		917
…		…
566	{	922	{
567	AV *av = newAV ();	923	AV *av = newAV ();
568		924
569	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
570		926
571	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
572	{	928	{
573	++dec->cur;	929	++dec->cur;
574		930
575	for (;;)	931	for (;;)
576	{	932	{
577	WANT (1);	933	WANT (1);
578		934
579	if (*dec->cur == (0xe0 | 31))	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
580	{	936	{
581	++dec->cur;	937	++dec->cur;
582	break;	938	break;
583	}	939	}
584		940
585	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
586	}	942	}
587	}	943	}
588	else	944	else
589	{	945	{
590	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
591		947
		948	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
592	av_fill (av, len - 1);	949	av_fill (av, len - 1);
593		950
594	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
595	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
596	}	953	}
597		954
598	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
599	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
600		957
601	fail:	958	fail:
602	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
603	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
604	return &PL_sv_undef;	961	return &PL_sv_undef;
605	}	962	}
606		963
607	static void	964	static void
608	decode_he (dec_t *dec, HV *hv)	965	decode_he (dec_t *dec, HV *hv)
609	{	966	{
610	// for speed reasons, we specialcase single-string	967	// for speed reasons, we specialcase single-string
611	// byte or utf-8 strings as keys.	968	// byte or utf-8 strings as keys, but only when !stringref
612		969
613	if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)	970	if (ecb_expect_true (!dec->stringref))
		971	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
614	{	972	{
615	I32 len = decode_uint (dec);	973	STRLEN len = decode_uint (dec);
616	char *key = (char *)dec->cur;	974	char *key = (char *)dec->cur;
617		975
		976	WANT (len);
618	dec->cur += len;	977	dec->cur += len;
619		978
620	hv_store (hv, key, len, decode_sv (dec), 0);	979	hv_store (hv, key, len, decode_sv (dec), 0);
		980
		981	return;
621	}	982	}
622	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	983	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
623	{	984	{
624	I32 len = decode_uint (dec);	985	STRLEN len = decode_uint (dec);
625	char *key = (char *)dec->cur;	986	char *key = (char *)dec->cur;
626		987
		988	WANT (len);
627	dec->cur += len;	989	dec->cur += len;
628		990
		991	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		992	if (!is_utf8_string (key, len))
		993	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		994
629	hv_store (hv, key, -len, decode_sv (dec), 0);	995	hv_store (hv, key, -len, decode_sv (dec), 0);
		996
		997	return;
630	}	998	}
631	else	999
632	{
633	SV *k = decode_sv (dec);	1000	SV *k = decode_sv (dec);
634	SV *v = decode_sv (dec);	1001	SV *v = decode_sv (dec);
635		1002
		1003	// we leak memory if uncaught exceptions are thrown by random magical
		1004	// methods, and this is hopefully the only place where it can happen,
		1005	// so if there is a chance of an exception, take the very slow path.
		1006	// since catching exceptions is "undocumented/internal/forbidden" by
		1007	// the new p5p powers, we need to call out to a perl function :/
		1008	if (ecb_expect_false (SvAMAGIC (k)))
		1009	{
		1010	dSP;
		1011
		1012	ENTER; SAVETMPS;
		1013	PUSHMARK (SP);
		1014	EXTEND (SP, 3);
		1015	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		1016	PUSHs (sv_2mortal (k));
		1017	PUSHs (sv_2mortal (v));
		1018
		1019	PUTBACK;
		1020	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		1021	SPAGAIN;
		1022
		1023	FREETMPS; LEAVE;
		1024
		1025	if (SvTRUE (ERRSV))
		1026	ERR_ERRSV;
		1027
		1028	return;
		1029	}
		1030
636	hv_store_ent (hv, k, v, 0);	1031	hv_store_ent (hv, k, v, 0);
637	SvREFCNT_dec (k);	1032	SvREFCNT_dec_NN (k);
638	}	1033
		1034	fail:
		1035	;
639	}	1036	}
640		1037
641	static SV *	1038	static SV *
642	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
643	{	1040	{
644	HV *hv = newHV ();	1041	HV *hv = newHV ();
645		1042
646	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
647		1044
648	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
649	{	1046	{
650	++dec->cur;	1047	++dec->cur;
651		1048
652	for (;;)	1049	for (;;)
653	{	1050	{
654	WANT (1);	1051	WANT (1);
655		1052
656	if (*dec->cur == (0xe0 | 31))	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
657	{	1054	{
658	++dec->cur;	1055	++dec->cur;
659	break;	1056	break;
660	}	1057	}
661		1058
662	decode_he (dec, hv);	1059	decode_he (dec, hv);
663	}	1060	}
664	}	1061	}
665	else	1062	else
666	{	1063	{
667	int pairs = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
668		1067
669	while (pairs--)	1068	while (pairs--)
670	decode_he (dec, hv);	1069	decode_he (dec, hv);
671	}	1070	}
672		1071
673	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
674	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
675		1074
676	fail:	1075	fail:
677	SvREFCNT_dec (hv);	1076	SvREFCNT_dec_NN (hv);
678	DEC_DEC_DEPTH;	1077	DEC_DEC_DEPTH;
679	return &PL_sv_undef;	1078	return &PL_sv_undef;
680	}	1079	}
681		1080
682	static SV *	1081	static SV *
683	decode_str (dec_t *dec, int utf8)	1082	decode_str (dec_t *dec, int utf8)
684	{	1083	{
685	SV *sv = 0;	1084	SV *sv = 0;
686		1085
687	if ((*dec->cur & 31) == 31)	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
688	{	1087	{
		1088	// indefinite length strings
689	++dec->cur;	1089	++dec->cur;
690		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
691	sv = newSVpvn ("", 0);	1093	sv = newSVpvn ("", 0);
692		1094
693	// not very fast, and certainly not robust against illegal input
694	for (;;)	1095	for (;;)
695	{	1096	{
696	WANT (1);	1097	WANT (1);
697		1098
698	if (*dec->cur == (0xe0 | 31))	1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
699	{	1101	{
700	++dec->cur;	1102	++dec->cur;
701	break;	1103	break;
702	}	1104	}
		1105	else
		1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
703		1107
704	sv_catsv (sv, decode_sv (dec));	1108	STRLEN len = decode_uint (dec);
		1109
		1110	WANT (len);
		1111	sv_catpvn (sv, dec->cur, len);
		1112	dec->cur += len;
705	}	1113	}
706	}	1114	}
707	else	1115	else
708	{	1116	{
709	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
710		1118
711	WANT (len);	1119	WANT (len);
712	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
713	dec->cur += len;	1121	dec->cur += len;
		1122
		1123	if (ecb_expect_false (dec->stringref)
		1124	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1125	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
714	}	1126	}
715		1127
716	if (utf8)	1128	if (utf8)
		1129	{
		1130	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1131	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1132	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1133
717	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
718		1136
719	return sv;	1137	return sv;
720		1138
721	fail:	1139	fail:
722	SvREFCNT_dec (sv);	1140	SvREFCNT_dec (sv);
…		…
732	WANT (1);	1150	WANT (1);
733		1151
734	switch (tag)	1152	switch (tag)
735	{	1153	{
736	case CBOR_TAG_MAGIC:	1154	case CBOR_TAG_MAGIC:
737	return decode_sv (dec);	1155	sv = decode_sv (dec);
		1156	break;
738		1157
739	case CBOR_TAG_INDIRECTION:	1158	case CBOR_TAG_INDIRECTION:
740	return newRV_noinc (decode_sv (dec));	1159	sv = newRV_noinc (decode_sv (dec));
		1160	break;
		1161
		1162	case CBOR_TAG_STRINGREF_NAMESPACE:
		1163	{
		1164	// do not use SAVETMPS/FREETMPS, as these will
		1165	// erase mortalised caches, e.g. "shareable"
		1166	ENTER;
		1167
		1168	SAVESPTR (dec->stringref);
		1169	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1170
		1171	sv = decode_sv (dec);
		1172
		1173	LEAVE;
		1174	}
		1175	break;
		1176
		1177	case CBOR_TAG_STRINGREF:
		1178	{
		1179	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1180	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1181
		1182	UV idx = decode_uint (dec);
		1183
		1184	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1185	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1186
		1187	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1188	}
		1189	break;
741		1190
742	case CBOR_TAG_VALUE_SHAREABLE:	1191	case CBOR_TAG_VALUE_SHAREABLE:
743	{	1192	{
744	if (ecb_expect_false (!dec->shareable))	1193	if (ecb_expect_false (!dec->shareable))
745	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());	1194	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
746		1195
		1196	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1197	{
747	sv = newSV (0);	1198	sv = newSV (0);
748	av_push (dec->shareable, SvREFCNT_inc_NN (sv));	1199	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
749		1200
750	SV *osv = decode_sv (dec);	1201	SV *osv = decode_sv (dec);
751	sv_setsv (sv, osv);	1202	sv_setsv (sv, osv);
752	SvREFCNT_dec_NN (osv);	1203	SvREFCNT_dec_NN (osv);
753	}	1204	}
754		1205	else
755	return sv;	1206	{
		1207	av_push (dec->shareable, &PL_sv_undef);
		1208	int idx = AvFILLp (dec->shareable);
		1209	sv = decode_sv (dec);
		1210	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1211	}
		1212	}
		1213	break;
756		1214
757	case CBOR_TAG_VALUE_SHAREDREF:	1215	case CBOR_TAG_VALUE_SHAREDREF:
758	{	1216	{
759	if ((*dec->cur >> 5) != 0)	1217	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
760	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");	1218	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
761		1219
762	UV idx = decode_uint (dec);	1220	UV idx = decode_uint (dec);
763		1221
764	if (!dec->shareable || idx > AvFILLp (dec->shareable))	1222	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
765	ERR ("corrupted CBOR data (sharedref index out of bounds)");	1223	ERR ("corrupted CBOR data (sharedref index out of bounds)");
766		1224
767	return SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);	1225	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1226
		1227	if (sv == &PL_sv_undef)
		1228	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
768	}	1229	}
		1230	break;
769		1231
770	case CBOR_TAG_PERL_OBJECT:	1232	case CBOR_TAG_PERL_OBJECT:
771	{	1233	{
		1234	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1235	goto filter;
		1236
772	sv = decode_sv (dec);	1237	sv = decode_sv (dec);
773		1238
774	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1239	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
775	ERR ("corrupted CBOR data (non-array perl object)");	1240	ERR ("corrupted CBOR data (non-array perl object)");
776		1241
…		…
786	if (!method)	1251	if (!method)
787	ERR ("cannot decode perl-object (package does not have a THAW method)");	1252	ERR ("cannot decode perl-object (package does not have a THAW method)");
788		1253
789	dSP;	1254	dSP;
790		1255
791	ENTER; SAVETMPS; PUSHMARK (SP);	1256	ENTER; SAVETMPS;
		1257	PUSHMARK (SP);
792	EXTEND (SP, len + 1);	1258	EXTEND (SP, len + 1);
793	// we re-bless the reference to get overload and other niceties right	1259	// we re-bless the reference to get overload and other niceties right
794	PUSHs (*av_fetch (av, 0, 1));	1260	PUSHs (*av_fetch (av, 0, 1));
795	PUSHs (sv_cbor);	1261	PUSHs (sv_cbor);
796		1262
…		…
804	SPAGAIN;	1270	SPAGAIN;
805		1271
806	if (SvTRUE (ERRSV))	1272	if (SvTRUE (ERRSV))
807	{	1273	{
808	FREETMPS; LEAVE;	1274	FREETMPS; LEAVE;
809	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));	1275	ERR_ERRSV;
810	}	1276	}
811		1277
812	SvREFCNT_dec (sv);	1278	SvREFCNT_dec_NN (sv);
813	sv = SvREFCNT_inc (POPs);	1279	sv = SvREFCNT_inc (POPs);
814		1280
815	PUTBACK;	1281	PUTBACK;
816		1282
817	FREETMPS; LEAVE;	1283	FREETMPS; LEAVE;
818
819	return sv;
820	}	1284	}
		1285	break;
821		1286
822	default:	1287	default:
		1288	filter:
823	{	1289	{
		1290	SV *tag_sv = newSVuv (tag);
		1291
824	sv = decode_sv (dec);	1292	sv = decode_sv (dec);
825		1293
		1294	dSP;
		1295	ENTER; SAVETMPS;
		1296	PUSHMARK (SP);
		1297	EXTEND (SP, 2);
		1298	PUSHs (tag_sv);
		1299	PUSHs (sv);
		1300
		1301	PUTBACK;
		1302	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1303	SPAGAIN;
		1304
		1305	if (SvTRUE (ERRSV))
		1306	{
		1307	SvREFCNT_dec_NN (tag_sv);
		1308	FREETMPS; LEAVE;
		1309	ERR_ERRSV;
		1310	}
		1311
		1312	if (count)
		1313	{
		1314	SvREFCNT_dec_NN (tag_sv);
		1315	SvREFCNT_dec_NN (sv);
		1316	sv = SvREFCNT_inc_NN (TOPs);
		1317	SP -= count;
		1318	}
		1319	else
		1320	{
826	AV *av = newAV ();	1321	AV *av = newAV ();
827	av_push (av, newSVuv (tag));	1322	av_push (av, tag_sv);
828	av_push (av, sv);	1323	av_push (av, sv);
829		1324
830	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1325	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
831	? cbor_tagged_stash	1326	? cbor_tagged_stash
832	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1327	: gv_stashpv ("CBOR::XS::Tagged" , 1);
833
834	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1328	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
835	}	1329	}
		1330
		1331	PUTBACK;
		1332
		1333	FREETMPS; LEAVE;
		1334	}
		1335	break;
836	}	1336	}
		1337
		1338	return sv;
837		1339
838	fail:	1340	fail:
839	SvREFCNT_dec (sv);	1341	SvREFCNT_dec (sv);
840	return &PL_sv_undef;	1342	return &PL_sv_undef;
841	}	1343	}
…		…
843	static SV *	1345	static SV *
844	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
845	{	1347	{
846	WANT (1);	1348	WANT (1);
847		1349
848	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
849	{	1351	{
850	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
851	return newSVuv (decode_uint (dec));	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
852	case 1: // negative int	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
853	return newSViv (-1 - (IV)decode_uint (dec));	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
854	case 2: // octet string	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
855	return decode_str (dec, 0);	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
856	case 3: // utf-8 string	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
857	return decode_str (dec, 1);	1359
858	case 4: // array	1360	case MAJOR_MISC >> MAJOR_SHIFT:
859	return decode_av (dec);
860	case 5: // map
861	return decode_hv (dec);
862	case 6: // tag
863	return decode_tagged (dec);
864	case 7: // misc
865	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
866	{	1362	{
867	case 20:	1363	case SIMPLE_FALSE:
868	#if CBOR_SLOW	1364	#if CBOR_SLOW
869	types_false = get_bool ("Types::Serialiser::false");	1365	types_false = get_bool ("Types::Serialiser::false");
870	#endif	1366	#endif
871	return newSVsv (types_false);	1367	return newSVsv (types_false);
872	case 21:	1368	case SIMPLE_TRUE:
873	#if CBOR_SLOW	1369	#if CBOR_SLOW
874	types_true = get_bool ("Types::Serialiser::true");	1370	types_true = get_bool ("Types::Serialiser::true");
875	#endif	1371	#endif
876	return newSVsv (types_true);	1372	return newSVsv (types_true);
877	case 22:	1373	case SIMPLE_NULL:
878	return newSVsv (&PL_sv_undef);	1374	return newSVsv (&PL_sv_undef);
879	case 23:	1375	case SIMPLE_UNDEF:
880	#if CBOR_SLOW	1376	#if CBOR_SLOW
881	types_error = get_bool ("Types::Serialiser::error");	1377	types_error = get_bool ("Types::Serialiser::error");
882	#endif	1378	#endif
883	return newSVsv (types_error);	1379	return newSVsv (types_error);
884		1380
885	case 25:	1381	case MISC_FLOAT16:
886	{	1382	{
887	WANT (2);	1383	WANT (2);
888		1384
889	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
890	dec->cur += 2;	1386	dec->cur += 2;
891		1387
892	return newSVnv (ecb_binary16_to_float (fp));	1388	return newSVnv (ecb_binary16_to_float (fp));
893	}	1389	}
894		1390
895	case 26:	1391	case MISC_FLOAT32:
896	{	1392	{
897	uint32_t fp;	1393	uint32_t fp;
898	WANT (4);	1394	WANT (4);
899	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
900	dec->cur += 4;	1396	dec->cur += 4;
…		…
903	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
904		1400
905	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
906	}	1402	}
907		1403
908	case 27:	1404	case MISC_FLOAT64:
909	{	1405	{
910	uint64_t fp;	1406	uint64_t fp;
911	WANT (8);	1407	WANT (8);
912	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
913	dec->cur += 8;	1409	dec->cur += 8;
…		…
916	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
917		1413
918	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
919	}	1415	}
920		1416
921	// 0..19 unassigned	1417	// 0..19 unassigned simple
922	// 24 reserved + unassigned (reserved values are not encodable)	1418	// 24 reserved + unassigned simple (reserved values are not encodable)
		1419	// 28-30 unassigned misc
		1420	// 31 break code
923	default:	1421	default:
924	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
925	}	1423	}
926		1424
927	break;	1425	break;
928	}	1426	}
929		1427
…		…
932	}	1430	}
933		1431
934	static SV *	1432	static SV *
935	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
936	{	1434	{
937	dec_t dec = { };	1435	dec_t dec = { 0 };
938	SV *sv;	1436	SV *sv;
939	STRLEN len;	1437	STRLEN len;
940	char *data = SvPVbyte (string, len);	1438	char *data = SvPVbyte (string, len);
941		1439
942	if (len > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
…		…
956	if (dec.cur != dec.end && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
957	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
958		1456
959	if (dec.err)	1457	if (dec.err)
960	{	1458	{
		1459	if (dec.shareable)
		1460	{
		1461	// need to break cyclic links, which would all be in shareable
		1462	int i;
		1463	SV **svp;
		1464
		1465	for (i = av_len (dec.shareable) + 1; i--; )
		1466	if ((svp = av_fetch (dec.shareable, i, 0)))
		1467	sv_setsv (*svp, &PL_sv_undef);
		1468	}
		1469
961	SvREFCNT_dec (sv);	1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
962	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);	1475	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
963	}	1476	}
964		1477
965	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
966		1479
967	return sv;	1480	return sv;
968	}	1481	}
969		1482
		1483	/////////////////////////////////////////////////////////////////////////////
		1484	// incremental parser
		1485
		1486	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1487
		1488	// returns 0 for notyet, 1 for success or error
		1489	static int
		1490	incr_parse (CBOR *self, SV *cborstr)
		1491	{
		1492	STRLEN cur;
		1493	SvPV (cborstr, cur);
		1494
		1495	while (ecb_expect_true (self->incr_need <= cur))
		1496	{
		1497	// table of integer count bytes
		1498	static I8 incr_len[MINOR_MASK + 1] = {
		1499	0, 0, 0, 0, 0, 0, 0, 0,
		1500	0, 0, 0, 0, 0, 0, 0, 0,
		1501	0, 0, 0, 0, 0, 0, 0, 0,
		1502	1, 2, 4, 8,-1,-1,-1,-2
		1503	};
		1504
		1505	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1506	U8 m = *p & MINOR_MASK;
		1507	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1508	I8 ilen = incr_len[m];
		1509
		1510	self->incr_need = self->incr_pos + 1;
		1511
		1512	if (ecb_expect_false (ilen < 0))
		1513	{
		1514	if (m != MINOR_INDEF)
		1515	return 1; // error
		1516
		1517	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1518	{
		1519	if (count >= 0)
		1520	return 1; // error
		1521
		1522	count = 1;
		1523	}
		1524	else
		1525	{
		1526	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1527	count = -1;
		1528	}
		1529	}
		1530	else
		1531	{
		1532	self->incr_need += ilen;
		1533	if (ecb_expect_false (self->incr_need > cur))
		1534	return 0;
		1535
		1536	int major = *p >> MAJOR_SHIFT;
		1537
		1538	switch (major)
		1539	{
		1540	case MAJOR_TAG >> MAJOR_SHIFT:
		1541	++count; // tags merely prefix another value
		1542	break;
		1543
		1544	case MAJOR_BYTES >> MAJOR_SHIFT:
		1545	case MAJOR_TEXT >> MAJOR_SHIFT:
		1546	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1547	case MAJOR_MAP >> MAJOR_SHIFT:
		1548	{
		1549	UV len;
		1550
		1551	if (ecb_expect_false (ilen))
		1552	{
		1553	len = 0;
		1554
		1555	do {
		1556	len = (len << 8) | *++p;
		1557	} while (--ilen);
		1558	}
		1559	else
		1560	len = m;
		1561
		1562	switch (major)
		1563	{
		1564	case MAJOR_BYTES >> MAJOR_SHIFT:
		1565	case MAJOR_TEXT >> MAJOR_SHIFT:
		1566	self->incr_need += len;
		1567	if (ecb_expect_false (self->incr_need > cur))
		1568	return 0;
		1569
		1570	break;
		1571
		1572	case MAJOR_MAP >> MAJOR_SHIFT:
		1573	len <<= 1;
		1574	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1575	if (len)
		1576	{
		1577	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1578	count = len + 1;
		1579	}
		1580	break;
		1581	}
		1582	}
		1583	}
		1584	}
		1585
		1586	self->incr_pos = self->incr_need;
		1587
		1588	if (count > 0)
		1589	{
		1590	while (!--count)
		1591	{
		1592	if (!AvFILLp (self->incr_count))
		1593	return 1; // done
		1594
		1595	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1596	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1597	}
		1598
		1599	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1600	}
		1601	}
		1602
		1603	return 0;
		1604	}
		1605
		1606
970	/////////////////////////////////////////////////////////////////////////////	1607	/////////////////////////////////////////////////////////////////////////////
971	// XS interface functions	1608	// XS interface functions
972		1609
973	MODULE = CBOR::XS PACKAGE = CBOR::XS	1610	MODULE = CBOR::XS PACKAGE = CBOR::XS
974		1611
…		…
982		1619
983	types_true = get_bool ("Types::Serialiser::true" );	1620	types_true = get_bool ("Types::Serialiser::true" );
984	types_false = get_bool ("Types::Serialiser::false");	1621	types_false = get_bool ("Types::Serialiser::false");
985	types_error = get_bool ("Types::Serialiser::error");	1622	types_error = get_bool ("Types::Serialiser::error");
986		1623
		1624	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1625
987	sv_cbor = newSVpv ("CBOR", 0);	1626	sv_cbor = newSVpv ("CBOR", 0);
988	SvREADONLY_on (sv_cbor);	1627	SvREADONLY_on (sv_cbor);
		1628
		1629	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
989	}	1630	}
990		1631
991	PROTOTYPES: DISABLE	1632	PROTOTYPES: DISABLE
992		1633
993	void CLONE (...)	1634	void CLONE (...)
…		…
1012	void shrink (CBOR *self, int enable = 1)	1653	void shrink (CBOR *self, int enable = 1)
1013	ALIAS:	1654	ALIAS:
1014	shrink = F_SHRINK	1655	shrink = F_SHRINK
1015	allow_unknown = F_ALLOW_UNKNOWN	1656	allow_unknown = F_ALLOW_UNKNOWN
1016	allow_sharing = F_ALLOW_SHARING	1657	allow_sharing = F_ALLOW_SHARING
1017	dedup_keys = F_DEDUP_KEYS	1658	allow_cycles = F_ALLOW_CYCLES
		1659	forbid_objects = F_FORBID_OBJECTS
1018	dedup_strings = F_DEDUP_STRINGS	1660	pack_strings = F_PACK_STRINGS
		1661	text_keys = F_TEXT_KEYS
		1662	text_strings = F_TEXT_STRINGS
		1663	validate_utf8 = F_VALIDATE_UTF8
1019	PPCODE:	1664	PPCODE:
1020	{	1665	{
1021	if (enable)	1666	if (enable)
1022	self->flags |= ix;	1667	self->flags |= ix;
1023	else	1668	else
…		…
1029	void get_shrink (CBOR *self)	1674	void get_shrink (CBOR *self)
1030	ALIAS:	1675	ALIAS:
1031	get_shrink = F_SHRINK	1676	get_shrink = F_SHRINK
1032	get_allow_unknown = F_ALLOW_UNKNOWN	1677	get_allow_unknown = F_ALLOW_UNKNOWN
1033	get_allow_sharing = F_ALLOW_SHARING	1678	get_allow_sharing = F_ALLOW_SHARING
1034	get_dedup_keys = F_DEDUP_KEYS	1679	get_allow_cycles = F_ALLOW_CYCLES
		1680	get_forbid_objects = F_FORBID_OBJECTS
1035	get_dedup_strings = F_DEDUP_STRINGS	1681	get_pack_strings = F_PACK_STRINGS
		1682	get_text_keys = F_TEXT_KEYS
		1683	get_text_strings = F_TEXT_STRINGS
		1684	get_validate_utf8 = F_VALIDATE_UTF8
1036	PPCODE:	1685	PPCODE:
1037	XPUSHs (boolSV (self->flags & ix));	1686	XPUSHs (boolSV (self->flags & ix));
1038		1687
1039	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1688	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1040	PPCODE:	1689	PPCODE:
…		…
1053	XPUSHs (ST (0));	1702	XPUSHs (ST (0));
1054		1703
1055	int get_max_size (CBOR *self)	1704	int get_max_size (CBOR *self)
1056	CODE:	1705	CODE:
1057	RETVAL = self->max_size;	1706	RETVAL = self->max_size;
		1707	OUTPUT:
		1708	RETVAL
		1709
		1710	void filter (CBOR *self, SV *filter = 0)
		1711	PPCODE:
		1712	SvREFCNT_dec (self->filter);
		1713	self->filter = filter ? newSVsv (filter) : filter;
		1714	XPUSHs (ST (0));
		1715
		1716	SV *get_filter (CBOR *self)
		1717	CODE:
		1718	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1058	OUTPUT:	1719	OUTPUT:
1059	RETVAL	1720	RETVAL
1060		1721
1061	void encode (CBOR *self, SV *scalar)	1722	void encode (CBOR *self, SV *scalar)
1062	PPCODE:	1723	PPCODE:
…		…
1077	EXTEND (SP, 2);	1738	EXTEND (SP, 2);
1078	PUSHs (sv);	1739	PUSHs (sv);
1079	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1740	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1080	}	1741	}
1081		1742
		1743	void incr_parse (CBOR *self, SV *cborstr)
		1744	ALIAS:
		1745	incr_parse_multiple = 1
		1746	PPCODE:
		1747	{
		1748	if (SvUTF8 (cborstr))
		1749	sv_utf8_downgrade (cborstr, 0);
		1750
		1751	if (!self->incr_count)
		1752	{
		1753	self->incr_count = newAV ();
		1754	self->incr_pos = 0;
		1755	self->incr_need = 1;
		1756
		1757	av_push (self->incr_count, newSViv (1));
		1758	}
		1759
		1760	do
		1761	{
		1762	if (!incr_parse (self, cborstr))
		1763	{
		1764	if (self->incr_need > self->max_size && self->max_size)
		1765	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1766	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1767
		1768	break;
		1769	}
		1770
		1771	SV *sv;
		1772	char *offset;
		1773
		1774	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1775	XPUSHs (sv);
		1776
		1777	sv_chop (cborstr, offset);
		1778
		1779	av_clear (self->incr_count);
		1780	av_push (self->incr_count, newSViv (1));
		1781
		1782	self->incr_pos = 0;
		1783	self->incr_need = self->incr_pos + 1;
		1784	}
		1785	while (ix);
		1786	}
		1787
		1788	void incr_reset (CBOR *self)
		1789	CODE:
		1790	{
		1791	SvREFCNT_dec (self->incr_count);
		1792	self->incr_count = 0;
		1793	}
		1794
		1795	void DESTROY (CBOR *self)
		1796	PPCODE:
		1797	cbor_free (self);
		1798
1082	PROTOTYPES: ENABLE	1799	PROTOTYPES: ENABLE
1083		1800
1084	void encode_cbor (SV *scalar)	1801	void encode_cbor (SV *scalar)
		1802	ALIAS:
		1803	encode_cbor = 0
		1804	encode_cbor_sharing = F_ALLOW_SHARING
1085	PPCODE:	1805	PPCODE:
1086	{	1806	{
1087	CBOR cbor;	1807	CBOR cbor;
1088	cbor_init (&cbor);	1808	cbor_init (&cbor);
		1809	cbor.flags |= ix;
1089	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1810	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1090	XPUSHs (scalar);	1811	XPUSHs (scalar);
1091	}	1812	}
1092		1813
1093	void decode_cbor (SV *cborstr)	1814	void decode_cbor (SV *cborstr)
…		…
1097	cbor_init (&cbor);	1818	cbor_init (&cbor);
1098	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1819	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1099	XPUSHs (cborstr);	1820	XPUSHs (cborstr);
1100	}	1821	}
1101		1822
		1823	#ifdef __AFL_COMPILER
		1824
		1825	void
		1826	afl_init ()
		1827	CODE:
		1828	__AFL_INIT ();
		1829
		1830	int
		1831	afl_loop (unsigned int count = 10000)
		1832	CODE:
		1833	RETVAL = __AFL_LOOP (count);
		1834	OUTPUT:
		1835	RETVAL
		1836
		1837	#endif
		1838

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